Scale-plate.



No. 839,258. PATVENTED DEC. 25,- 1906.

A. 0. BENEOKE.

SCALE PLATE. 'APPLIGATION FI ED MAB.31.1906.

. I INVENTOR arro mvns.

UNITE STATES 'PATENT orsion.

ADELBERT o. BENECKE, or NEWARK, new JERSEY, ASSIGNOR TOAMERI- CANINSTRUMENT COMPANY,

'IION OF NEW JERSEY.

To (I/ZZZUh/OTI Q/ it may concern; Be it known that I, ADELBERT O. BENEcE, residing inthe city of Newark, in the county of Essex and State ofNew Jersey, have invented a new and useful Scale-Plate, of which thefollowing is a full and complete description, such as will enable othersskilled in the art to which itpertains to make and use the same. Myinvention relates to scale or dial plates; and its object is to improvethe construction of such scale-plates, whereby the cost may be reducedto a minimum and liability, to warp or become distorted through thechanges atmospheric temperature or humidity may be quite effectuallyobviated. I

Scale-plates made in accordance with my invention are particularlyadapted for use in connection with measuring instruments of variouskindssuch as barometers, thermometers, electrical measuring instruments,

, and'tlie like-where changes are indicated by means of a pointerpassing over the face of a scale and operated by some moving part of theinstrument itself.

In carrying out my invention I make use of the structure. illustrated inthe accompanying.drawings, in which Figure l is a plan view of ascale-plate made in accordance with my invention and illustrating themethod of applying the scale to the metal base-plate, and Fig. 2 1s acrosssection on line a: or of Fig. 1, and Figs. 3 and 4 illustratemodification l Similar reference-numerals refer to like parts in thefigures.

The metal plate 1 is cut out of sheet metal or other suitable materialin the shape indicated or in any other form convenient for use in theparticular instrum'entfto which my scale-plate is applied. This metalplate is provided with a series of marginal apertures 2, countersunk,asindicated at 3 in Fig. 2. The scale 4 is printed or drawn upon a'sheetof thick paper, thin cardboard, oro ther material suitable for useinthis relation, and. the material is cut to conform to the generalcontour of the metal base 1, as indicated. Adhesive material is appliedto'the back ofthe scale-sheet 5, and while still moist the paper thusprepared is applied to the face of the metal base 1 and pressed firmlyupon said base, so

I Specification of Letters iatent. Application filed March 31,1906,Serial No. 309,069.

SCALE-PLATE.

Patented Dec. 25, 1 906.

to ooze through the countersunk holes 3, where on thoroughly drying itforms into the hedged bulbs 6 upon the back of said plate,.andthusfirmly secures the scale-sheet 5 to themetal base. As an adhesivematerial I ordinarily employ a special composition of which the baseisshellac, inasmuch as such composition is not aflected by moisture.

In Fig. 4 I have illustrated a slight modification,in which Icountersink both sides of the base-plate, as at 7 and 8. This gives thelarger body of the cementitious material in the countersunk space, whichunder some circumstances is more desirable than to countersink one sidealone.

I may utilize old base-plates wherein the scale-sheets have been held inposition by means of screws threaded into apertures in the base-plate.This is illustrated in Fig. 3 at 9. The screw-threads form admirableholding means for the adhesive material forced therein in the act ofpressing the scalethat the excess of adhesive material is made sheethome upon the base-plate. I am thus enabled to apply this scale-sheetdirectly to the base-plate without the necessity of counthat the use ofscrews or other projections 'upon the faceof'the scgle-plate, whichmight interfere with the free movement of the indieating-needle, isentirely obviated, while the materials used are of "such a character asnot to be affected by the surrounding temperature or the humidity in theatmosphere.

I do not wish to be understood s claiming the specific former shape ofscale-plate as illustrated in the drawings, as my invention is capableof application to scale-plates of any form.

The main feature of the invention resides IOO in the method of applyingthe scale itself to the base-plate so as to obviate the use of screws orrivets for holding the same in position, while at the same time theconstruction of the countersunk apertures 2 is such as to firmly clenchthe adhesive material and avoid any liability of the scale-sheet itselfbreaking away from the base-plate.

I claim 1. An improved scale-plate, comprising a metal base-plate havinga series of marginal apertures, a scale-sheet secured to said baseplateby means of an adhesive material applied to the rear surface of saidsheet and pressed against the front of said base-plate to force theadhesive material adjacent to said apertures into the same.

2. An improved scale-plate comprising a metal baselate having a seriesof marginal countersun a ertures, and a paper scalesheet adhesive ysecured to said base-plate through said marginal countersunk aperturesby means of cementitious material.

3. An improved scale-plate comprising a base-plate having a series ofmarginal countersunk apertures, and a scale-sheet afiixed to the face ofsaid base-plate by means of an adhesive material which fills saidcountersunk apertures.

4. An improved scale-plate comprising a base-plate having a series ofmarginal apertures countersunk upon the rear side of the plate, and ascale-sheet secured to said baseplate by means of cementitious materialapplied to the back of the scale-sheet and forced into said countersunkmarginal apertures.

This specification signed and witnessed this 29th day of March, 1906.

ADELBERT O. BENECKE.

Witnesses:

LoUIs M. SANDERS, W. A. LA Mom.

